634688359 has 2 divisors, whose sum is σ = 634688360. Its totient is φ = 634688358.

The previous prime is 634688309. The next prime is 634688377. The reversal of 634688359 is 953886436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634688359 - 2⁷ = 634688231 is a prime.

It is a super-2 number, since 2×634688359² = 805658626100225762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634688309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317344179 + 317344180.

It is an arithmetic number, because the mean of its divisors is an integer number (317344180).

Almost surely, 2^634688359 is an apocalyptic number.

634688359 is a deficient number, since it is larger than the sum of its proper divisors (1).

634688359 is an equidigital number, since it uses as much as digits as its factorization.

634688359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The square root of 634688359 is about 25193.0220299193. The cubic root of 634688359 is about 859.3831700010.

The spelling of 634688359 in words is "six hundred thirty-four million, six hundred eighty-eight thousand, three hundred fifty-nine".